Grass edging device



Aug. 9, 1949. G. T. LA BONTE GRASS EDGING'DEVICE 2 Shegts-Sheeb 1 Filed July 21, 1945 Inventor Qeofqe T La B on t'e, 2 cal/WW Attorneys Aug. 9, 1949. G. T. LA BONTE I 2,478,587

GRASS EDGING DEVICE Filed July 21, 1945 2 Sheets-Sheet 2 Inventor GeorqeT La. B oncz M W I, Hi,

W Attorneys Patented Aug. 9, 1949 amiss EDGINGJDEVICE L George l La Bonte, Miami, Fla. Application July 21', 1945, 'S erialNo. 606,391

" I- his invention relates to agrass edging device, am'imore particularly to such a device adapted fbr trimming the edges of lawns or the like, where such lawns abut-curbings or similar-obstructions.

A primar object of-this invention is theprovision of arr improved edging device characterized by a travelling wheel adapted to ride on a curb or sirn'ilar structure, and having a rotatable blade and-a fixed bla'de associated therewith whereby the edge o'f thegrass may =be-eut to a desired depth and width away from the edge, in a shearing action. r

A further object of the invention is the provision of such a device characterized by a pinra lity-ofattachments, where its travelling wheel is adapted to ride to trim other edges not acces sible otherwise, whereby the cut maybe suitably varied as desired.

Still, another object of the invention is the provision of such a device-which will be sturdy and durable inconstruction, reliable andfiefli-cient in operation, and relatively simple and inexpensive to manufacture and'ass'einble;

OtheILfOlbjeCl/S reside in the combinations of elements, arrangements -'of parts, and features of construction, all as will be morefully pointed out hereinafter and disclosed in the accompanying drawings wherein there is shown a preferred embodiment of this inventive concept.

In the drawings:

Figure 1 is a side elevational view of one [form of device embodying this invention, certain parts thereof being broken away, and certain other parts being indicated in dotted lines.

Figure 2 is a sectional View taken substantially along the line 2--2 of Figure 1, certain parts omitted in Figure 1 being disclosed in Figure 2.

Figure 3 is a view similar to Figure 2 but showing certain parts in elevation, and showing certain further alternative parts in position on the apparatus.

Similar reference characters refer to similar parts throughout the several views ofthe drawings.

Having reference now to the drawings, there is disclosed at In an axle, having a threaded extremity on which is positioned a not H and a lock nut l2. Secured to the axle inwardly of the lock nut I2 is a radial arm l3 through which extends a tapered pin l3 engaging the axle l0. At the extremity of the arm I3 opposite the axle I is a handle M which is secured to the arm l3 .by means of bolts I5 and nuts I6.

Positioned interiorly of the arm I3 is a wheel I'!, rotatable about the axle l0 and provided 1 Claim.. (01. se -256 12 witna peripheral flangel 'l 9, ion the intenior: tace of which is positioned'an in-ternal ringzgear 20.

The axle l1! "also carries an arm 2 I secured to the axle by-"means of 'a tapered pin 22-2, which arm has secured thereto as by a b'o'lt :23 a-fcog gear 24 adapted to m'eshwithttheiring gear-20.

-A- gear 25 is imour-i t'ed for' rotation .aboutithe axle :10, and is provided with a 'spacingcollar 26 adapted to offset the-gear from' the iarm 2:1. 7

'The opposite side of the gear 25 carries Iaspacin'g collar 21 provided with lprongs 28, adapted ito engage in suitable recesses 29 in a' 'collar :38 mounted Io'rrotationon the axle 10.

' S'eeured as by screws 31-- at-suitable spaee'd points to the flange I9 is a disc :-32 'h'aving a bevelled edge-tii, servingias'azguide to the blades of the device, to 'be more fullyfdescribedihereinafter. The screws :31 =also- -hold inwardly exte'ndin'g flanges 34 :o'f annuter rotatable bladegenerally indicated. at 35, tandiincluding might angled portions 36 connected ibyan iexterio-rly 'ipositioned transverseqaortion-tsl.

:The. blade :35 and'the dis'c'32 are removable by removal: :of the a-scr'ews $31, as will be readily ap-'- parent, i for iafpurpose to'ibe -lmore i ully described hereinafter. a

A coiled spring 40 surround-s the sleeve 30, and abuts the inner surface of an inner rotatable blade 4i having notches 42 therein adapted to receive lugs or prongs 43 carried by the outer extremity of the sleeve 30. Suitable lock nuts 44 and 45 positioned on the opposite threaded extremity of the axle I0 serve to secure the blades in related assembly, the spring 40 biasing the inner blade 4| in close juxtaposition with the transverse portion 31 of the outer blade 35. It may here be pointed out that the disc 32 is provided with a relatively large centrally disposed aperture 46, adapted to surround the hub portion 21 of the gear 25.

From the foregoing the operation of the device should now be readily understandable. The handle H which is of any convenient length to facilitate use of the device is grasped, and the wheel I! positioned on a curb or the like and the device pushed either forwardly or rearwardly, the direction of movement having no effect on the operation thereof. Such rotation of the wheel I! occasions rotation of the ring gear 20, which in turn through gear 24 rotates the gear 25, which through the prong and sleeve connections previously described rotates the blade 4| in One direction. vThis blade acts against the outer blade 35 rotating in the opposite direction to effectively cut the grass adjacent the curbing.

vided adjacent opposite ends with apertures into 7 which the screws 3| are adapted to be posi tioned to enter the flange l9 or the wheel H. The blade 50' is provided with a suitable central aperture adapted to receive the hub portion 21 of the gear 25, and extending outwardly from opposite ends of the blade are parallel shear arms 52 of any desired length, as for example up to 4 or 6 inches or more A rotatable inner shear generally indicatedat 53 is comprised of a transverse blade 54 having a central aperture 56 for the reception of the axle l0. Opening into the aperture 56 are spaced notches for the reception of prongs or lugs 28 carried by the hub portion 21 of the gear 25. The blade 54 also has atopposite ends outwardly extending parallel shear arms 55 which run against the arms 52 of the blade 50, to effect a shearing action of the grass. When the shears 50 and 53 are positioned, with sleeve 30 on the axle H1, the spring 40 may be placed. over sleeve 30 and with the lock nuts 44 and 45 in place on the axle the spring serves to bias the shear 53 inwardly in juxtaposed relation with the shear 50.

The operation of this modification is substantially the same as that of the previously described modification, the distinction residing in the difference of depthand width of the cut.

From the foregoing it .will now be seen that there is herein provided an improved edging de- As many embodiments may be made of this inventive concept, and as many modifications may be made in the embodiment hereinbefore shown and described, it is to be understood that all matter herein is to be interpreted merely as illustrative and not in a limiting sense.

I claim:

A lawn edge trimmer comprising an axle, a handle fixed to the axle adjacent one end thereof, a hollow ground contacting drive wheel mounted to rotate on the axle adjacent the handle, a radial arm fixed to the axle within the wheel, an annular row of gear teeth on the inner periphery of the wheel, a pinion mounted on the arm to rotate about an axis parallel with the axis of the axle, the teeth of said pinion meshing with the annular row of teeth on the wheel, a drive gear mounted to rotate on the axle adjacent the arm, the teeth of said drive gear meshing with those of the pinion, a rotary shear mounted to rotate on the axle in spaced relation to the drive gear, means connecting the rotary shear with the drive wheel to cause the shear torotate in unison with the drive wheel, a cooperating rotary shear mounted on theaxle to rotate adjacent the first mentioned rotary shear, means coupling the cooperating rotary shear with the drive gear for rotation in unison therewith, and a compression coiled spring encircling the axle yield-ingly. to urge the shears into shearing relation to one another.

GEORGE T. LA BONTE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS FOREIGN PATENTS Country Date Great Britain Nov. 30, 1938 Number Number 

